Xash3D is a custom Gold Source build from a scratch. Xash3D overcomes obsolete Gold Source engine's limits and provides for you a new quality of gaming experience and modmaking capabilities, for example: higher limits for bsp-models, studiomodels scaling, realistic values of lighting on server side, entity patch technology support, support of additional map types, support of precaching "on the fly", support for using real HD-textures (up to 4096 x 4096 px) for maps, models, sprites and decals in any played mod and many other features...

The list has been updated on October 14th, 2014. Xash3D Engine was tested for compatibility with most of singleplayer Half-Life mods and maps, and for this moment the following list of maps & map packs, which can be played without any incompatibility issues, includes about 350 entries. It means that you can successfully play these maps and use all of their features with Xash3D Engine without significant differences in comparison with playing of them using original Half-Life engine.

Oxidum (the map is unfinished and after a dead-end there is another interesting place that you can reach only by using of noclip / эта карта незавершена, и после тупика в конце на ней есть ещё одно интересное место, куда можно попасть, только используя noclip)

Rescue by SaCo (there is an inner bug - once you have activated a scientist in the end of the map, you should run quickly from him to the door with a scanner, otherwise he gets stuck into you; so you have to kill all enemies before you activate him / в карте есть внутренний баг - как только вы активируете учёного, нужно быстро бежать от него к двери со сканером, иначе он застрянет в вас; поэтому вам нужно убить всех врагов перед тем, как активировать его)